Initially Semantic Web databases were primarily used for analytics. Users would dump data in their RDF database and then perform interesting analytics with rules, reasoners, and query languages like SPARQL. Nowadays enterprises are starting to consider NoSQL database options such as RDF in their primary processes and they are rightfully worried about transactionality, recoverability, automatic backup, replication, automatic failover, concurrency, and more. Even more important, for many applications they need a steady stream of intermixed additions, updates, deletes and queries. This seminar will cover strategies to manage these issues, some discussion around NoSQL - RDF, and conclude with a proposal for measuring the dynamism of RDF databases.

The Gruff Lab is the place for an early look at new features coming soon.

We're currently working on a new query system. Basically the View menu has a new Graphical Query View command to switch to the new view. In this new view you mainly use pop-up menus rather than menu bar commands, by right-clicking the background, nodes, and link lines to see their various context-sensitive menus.

The article that appeared in today's edition mentiones Joshua Shinavier, a PhD student at RPI has developed an application that runs searches of tweets using the location data they contain and uses Geonames to convert the latitude and longitude information in the tags into place names, then looks up those places in DBpedia to search for all tweets made from specific types of places. The application uses AllegroGraph.

Written by Mark Watson, this new book is intended to be a practical guide for using RDF data in information processing, linked data, and semantic web applications using both the AllegroGraph 4.0 commercial product and the Sesame open source project. Thanks Mark!

The latest release of AllegroGraph is 4.0.5, currently availablenatively for 64-bit Linux. For Windows and Mac users, we provide a Virtual Machine appliance. It's not for benchmarking, but it is useful if that's the machinery you have handy. We're also seeing the VM come in handy in a class room environment - with Linux, AllegroGraph 4.0.5, Gruff, AGWebView, Eclipse (for Java and Jena examples), and Python installed as a bundle. (It's a large download, but worth the wait.)